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SLAM, a Service for Landslide Monitoring Based on EO-Data

Paolo Manunta(1) and Lateltin Olivier(2)

(1) Planetek Italia s.r.l., Bari - Via Massaua, 12, 70123, Italy
(2) Federal Office for Water and Geology (FOWG), Ländtestrasse 20, CH-2503, Biel, Switzerland

Abstract

Every year slope instabilities cause large socio-economic losses on life and property worldwide. Indeed, the casualties caused by mass movements are among the highest in the industrialized world. In this contest SLAM, a project funded by ESA, is aimed to the implementation of landslides mapping and monitoring service. The main objective is to develop and qualify a complete service meant to supply products, mainly derived from satellite data, that can be integrated into the operational activities of those Institutions that are in charge of landslide risk management. A peculiarity of the SLAM project is the active involvement of the end-users. In fact, the service is tailored to the requirements proposed by some national and local organizations, involved in landslide risk assessment and management in Italy and Switzerland. The innovative aspect of the SLAM project is the integration of the SAR techniques and EO data with the in situ documentation currently in use for the landslide monitoring. In particular, SLAM is designed to realise three types of products: Landslide Motion Survey, Landslide Displacement Monitoring and Landslide Susceptibility Mapping. The Landslide Motion Survey is a large scale product and could be a useful support for the geological risk service agencies in their activities related to the update of landslide inventories and the planning of structural intervention. The Landslide Displacement Monitoring allows the monitoring of the areas of interest on a reduced scale basis. The objective is to accurately quantify the deformation field of unstable areas through the displacement rate measurement of some points located within the landslide body. The outputs could be integrated with the in situ observation to monitor the areas characterized with high hydrogeological risk, and to test the effectiveness of structural interventions. Landslide Susceptibility Mapping classifies the area of interest with respect to different classes of landslide susceptibility/hazard. The product is realized through the integration of the information concerning the spatial distribution of landslide, resulting from the two products above, with the thematic maps of land use, slope, geomorphology, and more. The Landslide Susceptibility Mapping could support geological hazard mapping and could be considered as an important tool for land use planning and environmental impact assessment. The realization of SLAM project, entirely funded by ESA, is carried out by an international Consortium led by Planetek Italia (I) and formed by other five partners: Tele-Rilevamento Europa (I), Gamma Remote Sensing (CH), Spacebel (B), Geotest (CH) and Earth Science Department of the University of Firenze (I). For the Italian service cases the interferometric analysis is based on the PS technique, developed and patented by the Politecnico di Milano (Italy) and improved by Tele-Rilevamento Europa. For the Swiss case, multi-pass SAR interferometry, including the Interferometric Point Target Analysis (IPTA), will be applied by Gamma Remote Sensing.

 

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Keywords: ESA European Space Agency - Agence spatiale europeenne, observation de la terre, earth observation, satellite remote sensing, teledetection, geophysique, altimetrie, radar, chimique atmospherique, geophysics, altimetry, radar, atmospheric chemistry